TECHNICAL DESCRIPTION (COMMENT)
The cause is thought to be malfunction of the power, earth circuitry or combination meter.TROUBLESHOOTING HINTS
- Malfunction of the combination meter
- Damaged wiring harness or connectors
DIAGNOSIS PROCEDURE
STEP 1. Measure the voltage at combination meter connector C-04 in order to check the battery circuit of power supply system to the combination meter.
- Disconnect the combination meter connector C-04 and measure the voltage at combination meter connector C-04 component side.
- Measure the voltage between terminal 35 and earth.
OK: Battery positive voltage
Q: IS the check result normal?
YES:
Go to Step 4.
NO: Go to Step 2.
STEP 3. Check the wiring harness between combination meter connector C-04 (terminal 35) and fusible link (1).
NOTE: Prior to the wiring harness inspection, check intermediate connectors A-14, C-125 and junction block connectors C-202 and C-204, and repair if necessary.
Q: Are the wiring harness between combination meter connector C-04 (terminal 35) and fusible link (1) in good condition?
YES:
There is no action to be taken.NO: Repair or replace the wiring harness. Check to see that all meters operate.
STEP 4. Measure the voltage at combination meter connector C-04 to check the battery circuit of power supply system to the combination meter.
- Measure at combination meter connector C-04 without disconnecting the connector.
- Turn the ignition switch to "ON" position.
- Measure the voltage between terminal 42 and earth.
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Go to Step 7.NO: Go to Step 5.
STEP 6. Check the wiring harness between combination meter connector C-04 (terminal 42) and ignition switch (IG1).
NOTE: Prior to the wiring harness inspection, check Junction block connectors C-203 and C-205, and repair if necessary.
Q: Are the wiring harness between combination meter connector C-04 (terminal 42) and ignition switch (IG1) in good condition?
YES:
There is no action to be taken.NO: Repair or replace the wiring harness. Check to see that all meters operate.
STEP 7. Measure the resistance at combination meter connector C-04 to check the earth circuit to the combination meter.
- Disconnect the combination meter connector C-04 and measure the resistance at combination meter connector C-04.
- Measure the resistance between terminal 40 and earth.
OK: 2 ohms or less
- Measure the resistance between terminal 41 and earth.
OK: 2 ohms or less
Q: Is the check result normal?
YES:
Repair or replace the connector.NO: Go to Step 8.
STEP 9. Check the wiring harness between combination meter connector C-04 (terminal 40 and 41) and earth.
Q: Are the wiring harness between combination meter connector C-04 (terminal 40 and 41) and earth in good condition?
YES:
This procedure is complete.NO: Repair or replace the wiring harness. Check to see that all meters operate.